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What is a filter? Filters are electronic circuits that emphasize certain signals and reject other signals. 

Crystal Filter Glossary/Terminology

Definition of a Monolithic Crystal Filter: A monolithic (Greek: one stone) crystal filter has 2 sets of electrodes deposited on the same quartz disc. This forms 2 resonators with acoustic (mechanical) coupling between them. If the acoustic coupling is correct a filter response will be achieved. 

Typical construction of a Discrete Crystal and a Monolithic Crystal 

Discrete Crystal                                                       Monolithic Crystal  

discrete crystal  monolithic crystal

Center Frequency

For bandpass or band reject filters, it is the arithmetic mean of the 3db point frequencies. Also used as the design midpoint of the passband. 

center frequency


Passband Bandwidth

In a bandpass filter, these limits, or passband edges, are generally the frequencies at which 3db of attenuation is measured. The number if hertz expressing the difference between the upper 3db frequency and lower 3db frequency of a bandpass filter.  

passband bandwidth center frequencyJPG


Insertion Loss

The amount of attenuation within the passband of the filter compared to the input signal level. May be measured at center frequency or within 1db passband limits.  

insertion loss center frequency


Ripple

The difference in attenuation between the highest peak and the lowest valley within the passband. It is measured in db.  

ripple center frequency


Ultimate Attenuation

The maximum attenuation guaranteed at the specified frequency range.  

ultimate attenuation center frequency

Spurious Response

Are produced by unwanted vibrational modes in the crystals. Every filter parameter can be moderately to severely distorted by them. They are generally located on the high frequency side of the passband, and in wideband filters, they can occur even within the passband.  

spurious response center frequency

Reasons to use Monolithic Crystal Filter
• Lower cost solution
• Less manufacturing time
• Smaller package size 

Crystal Filter Electrical Specifications

Standard/Required Specs.  Optional/Custom Specs. 
• Center Frequency (an absolute usually in MHz)
• Passband Bandwidth (3db or 6db in Hz)
• In-band Ripple (A maximum in dB)
• Insertion Loss (A maximum in dB)
• Stopband (Max. value in Hz @ 30dB, 60dB, etc.)
• Ultimate Attenuation (A minimum in dB) 
• Group Delay (in Seconds)
• Number of Poles
• Spurious Attenuation (A minimum in dB)
• In/Out Impedance (In ohms, typically +/-10%)
• In/Out Capacitance (Typically in picofarads) 

 

Crystal Filter Applications

Where/Who uses them? 
• Telecommunication Base Stations
• Radios (Receivers/Transmitters)
• Satellite modem applications (ground based side) 
• Radar Applications 

Crystal Filter SMD Package 

crystal filter smd package

Crystal Filter HC-49 Packages 

crystal filter hc 49 packages

Crystal Filter UM-1 Packages

crystal filter um 1 packages 

 

 

Product description:
•     AEC-Q200 Qualified, Grade 1
•     Handles high transient inrush current spikes
•     Magnetically shielded
•     Frequency range 20kHz to 10MHz
•     Inductance range from 0.09µH to 22µH
•     Current range from 1.1A to 32.0A
•     4.7 x 4.31 footprint surface mount package in 1.2, 1.5, 1.85 or 2.0mm heights
•     Rugged construction
•     Halogen free, lead free, RoHS compliant

Environmental data:
•     Storage temperature range (component):-55°C to +165°C
•     Operating temperature range: -55°C to +125°C 
•     Solder reflow temperature: J-STD-020D compliant 

Click here to download the Inductor Press Release 

Image  Open Circut Inductance I rms²I sat3DCR (mΩ)  Data Sheet 
ECS MPI4040 Parts Number± 20% (µH) (Amps)
 @ 25°C (Amps)  ± 20% @ 20°C  K-factor4 
R1 -- 1.2mm Height Data Sheet
ECS-MPI4040R1-R10-R 0.09  8  32.0† 8.5 1401
ECS-MPI4040R1-R15-R 0.15  26.0† 11 989
ECS-MPI4040R1-R22-R 0.23  5.5 21  18  814 
ECS-MPI4040R1-R33-R 0.33 4.4  17  28  659 
ECS-MPI4040R1-R47-R  0.47 5.2  11.5  20  1295 
ECS-MPI4040R1-R68-R  0.68 3.3  51  461 
ECS-MPI4040R1-1R0-R  1 3.7  7.7  40  990 
ECS-MPI4040R1-1R5-R  1.5 6.5  60  732 
ECS-MPI4040R1-2R2-R  2.2 2.6  5.9  80  623 
ECS-MPI4040R1-3R3-R  3.3 2.2  5.1  115  481 
ECS-MPI4040R1-4R7-R  4.7 1.8  3.8  180  411 
ECS-MPI4040R1-6R8-R  6.8 1.5  3.2  250  344 
ECS-MPI4040R1-100-R  10 1.2  2.8  370  276 
R2 -- 1.5mm Height
ECS MPI4040   ECS-MPI4040R2-R47-R  0.47 6.4  12.2  13 1403  Data Sheet
 ECS-MPI4040R2-1R0-R  1 4.6  8.9  25  935 
 ECS-MPI4040R2-1R5-R  1.5 3.8  7.6  37  701 
 ECS-MPI4040R2-2R2-R  2.2 3.2  5.7  58  647 
 ECS-MPI4040R2-3R3-R  3.3 2.6  5.4  76  495 
 ECS-MPI4040R2-4R7-R  4.7 2.2  4.3  105  421 
 ECS-MPI4040R2-6R8-R  6.8 1.8  3.4  158  351 
 ECS-MPI4040R2-100-R  10 1.5  3.1  240  271 

 

Image  Open Circut Inductance I rms²I sat3DCR (mΩ)  Data Sheet 
ECS MPI4040 Parts Number± 20% (µH) (Amps) @ 25°C (Amps)  ± 20% @ 20°C K-factor4  
R3 -- 1.85mm Height Data Sheet
 ECS-MPI4040R3-R22-R 0.22  20  5.8  1870 
 ECS-MPI4040R3-R47-R  0.47 5.8  17  10.3  1530 
 ECS-MPI4040R3-1R2-R  1.2 9.4  32  732 
ECS-MPI4040R3-1R5-R  1.5 3.8  8.2  36  673 
ECS-MPI4040R3-2R2-R  2.2 3.4  7.9  48  543 
ECS-MPI4040R3-3R3-R  3.3 6.6  60  432 
ECS-MPI4040R3-4R7-R  4.7 2.3  4.8  92  374 
ECS-MPI4040R3-6R8-R  6.8 4.5  120  306 
ECS-MPI4040R3-100-R  10 1.5  3.8  213  251 
ECS-MPI4040R3-150-R  15 1.3  285  213 
ECS-MPI4040R3-220-R  22.0†† 1.1  2.2  408  174 
R4 -- 2.0mm Height
ECS MPI4040  ECS-MPI4040R4-R22-R 0.22  10.1  15  5.3  2405  Data Sheet
ECS-MPI4040R4-R33-R  0.33 9.5  12.8  1870 
ECS-MPI4040R4-R47-R  0.45 8.1  11.5  8.2  1530 
ECS-MPI4040R4-1R0-R  1 5.7  8.2  17  990 
ECS-MPI4040R4-1R5-R  1.5 4.9  6.9  23  802 
ECS-MPI4040R4-2R2-R  2.2 3.9  5.7  35  673 
ECS-MPI4040R4-3R3-R  3.3†† 3.3  4.5  49  510 
ECS-MPI4040R4-4R7-R  4.7†† 2.9  3.9  67  455 
ECS-MPI4040R4-6R8-R 6.8†† 2.4 3.2 91 374
ECS-MPI4040R4-100-R 10.0†† 1.9 2.6 148 306
ECS-MPI4040R4-220-R 22.0†† 1.3 1.8 316 203

 

†   Transient pulse not to exceed 1 millisecond.

†† Maximum operating frequency less than 10MHz, consult factory for application specific values.

 

Package Size : 2.5 x 2.0 mm
Image   Open Circuit Inductance I rms² I sat3 DCR (mΩ)   Data Sheet
  Parts Number ± 20% (µH)  (Amps)  @ 25°C (Amps) MAX @ 25°C K-factor4   
ECS MPI4040 1.0 mm Max Height Data Sheet
ECS-MPI2520R0-R47-R 0.47 4.1 4.4 33.6 2887
ECS-MPI2520R0-1R0-R 0.9 3.2 3.2 60 1925
ECS-MPI2520R0-1R5-R 1.5 2.4 2.6 96 1444
ECS-MPI2520R0-2R2-R 2.2 2.2 2.4 123.6 1283
ECS-MPI2520R0-3R3-3 3.3 1.6 1.6 190 1050
ECS-MPI2520R0-4R7-R 4.7 1.4 1.4 240 825
ECS MPI4040 1.2 mm Max Height Data Sheet
ECS-MPI2520R1-R47-R 0.47 4.5 4.8 20 2310
ECS-MPI2520R1-1R0-R 1 3.7 4 35 1925
ECS-MPI2520R1-1R5-R 1.5 2.9 3.4 55 1444
ECS-MPI2520R1-2R2-R 2.2 2.3 2.7 75 1255
ECS-MPI2520R1-3R3-R 3.3 1.8 2.4 105 962
ECS-MPI2520R1-4R7-R 4.7 1.6 1.9 150 825
ECS-MPI2520R1-5R6-R 5.6 1.5 1.5 200 679
ECS-MPI2520R1-6R8-R 6.8 1.3 1.3 300 679
ECS-MPI2520R1-100-R 10 1.1 1.2 390 525

 

 

Package Size: 5.49 x 5.18 x 3.0 mm (LxWxH)
Image   Inductance DCR (mΩ MAX) DCR (mΩ TYP.) Rated Current Heat Rating Current Data Sheet
  Parts Number ± 20% (µH)      (A MAX) DC(A)  
ECS MPI4040 ECS-MPIL0530-R68MC 0.68 12 11 14.0 8.5 Data Sheet
ECS-MPIL0530-1R0MC 1.0 14 13 11 7
ECS-MPIL0530-1R5MC 1.5 25 20 10 6
ECS-MPIL0530-2R2MC 2.2 35 29 9 5.5
ECS-MPIL0530-3R3MC 3.3 38 32 7 5
ECS-MPIL0530-4R7MC 4.7 60 50 5 3
ECS-MPIL0530-220MC 22 324 270 3 2

 

 

Package Size: 7.4 x 6.6 x 3.0 mm (LxWxH)
Image   Inductance DC Resistance DC Resistance Rated Current Heat Rating Data Sheet
  Part Number (uH ±20%) (mΩ MAX) (mΩ TYP.) (A MAX) Current DC(A)  
ECS MPI4040 ECS-MPIL0630-R10MC 0.1 1.7 1.5 60 32.5 Data Sheet
ECS-MPIL0630-R20MC 0.2 3 2.4 34 24
ECS-MPIL0630-R33MC 0.33 3.5 3 25 21
ECS-MPIL0630-R47MC 0.47 4.1 3.4 20 18
ECS-MPIL0630-R68MC 0.68 5.3 4.8 17 16
ECS-MPIL0630-R82MC 0.82 6 5.4 16 14
ECS-MPIL0630-1R0MC 1 9.2 8.4 15 12
ECS-MPIL0630-1R5MC 1.5 12.1 10.6 14 10
ECS-MPIL0630-2R2MC 2.2 15 13.5 10 8
ECS-MPIL0630-3R3MC 3.3 22 18 9.5 6.5
ECS-MPIL0630-4R7MC 4.7 33 28 6.5 5.5
ECS-MPIL0630-5R6MC 5.6 42 39 6 5.5
ECS-MPIL0630-6R8MC 6.8 50 43.9 6 4.5
ECS-MPIL0630-8R2MC 8.2 60 54 6 4.5
ECS-MPIL0630-100MC 10 68 62 5.5 4
ECS-MPIL0630-150MC 15 95 90 4 3
ECS-MPIL0630-220MC 22 135 125 3 2.5

 

 

 

ECS 2100X 

Freq. Range 
Freq. Stability 
Temp. Range 
Ext. Temp. Range Option 
Data Sheet 
 1.0 ~ 150 MHz
 ± 100 PPM
-0 ~ +70° C 
Yes 



Support Documents 

Specifications

RoHS C of C

REACH C of C

Conflict Materials Reporting Template

Material Declaration

Solder Profile

Reliability Test Procedures

Technical Guides: Click here for Application Note.

 

 

To find an Authorized Representative in your area Click Here 

To find an Authorized Distributor in your area Click Here

 

Technical Guides:

ECS VXO 97 

Freq. Range 
Freq. Stability 
Temp. Range 
Data Sheet 
 3 ~ 77.76 MHz
 ±50 PPM
 -10 ~ +70° C

 

Support Documents 

Specifications 

REACH C of C

Conflict Materials Reporting Template

Technical Guides: Click here for Application Note.

 

 

To find an Authorized Representative in your area Click Here 

To find an Authorized Distributor in your area Click Here

 

Technical Guides: